George m



, n @uiten tutes getarnt @ffnet i y 4 GEORGE M. .Mounts AND JonnyMCGREARY, 0F GOHOES, vous.

Letters Paicnt No. 74,116, dated February 4, 1868,

dit tlnhula entre tain tinte ltettsts munt tnt mating putt of `ttc sans.

, -v m To ALL WHoM IT MAY coNcERN: it anni Be it known that we, GEORGEM. Mounts and Jenn McCnE'AnY, of Cohoes, in the county of Albany, und.v

State of New York, have invented n new and usefulImprovement in LoosePulleys, (Sieur-.W heels, te.; and' we` do hereby declare that thefollowing is a full, clear, and exact description thereof,`which willenoble those skilled in the art tn makc und use the same, referencebeing-'had ltothe accompanying `drawings, forming part -ol thisspecification, in whiching theoil.

Figure 1 represents a. longitudinal section of our invention. Figure 2is a longitudinal section of a modification of thesame, Figure 3 is a.transverse section of thescme.

Similar letters, of reference indicate corresponding parts.

This invention relates to a. new manner of forming' the recesses,channels, or grooves in the hubsof loose` i i pulleys, gear or otherwheels, erin the bushings fitted into their hubs.

The invention consists in providing channels in` or around the inner undouter surfaces of the bushings, and i in connecting the same with eachother, in such a. manner that the oil can 4flow from thecutercha'uuel tothe shaft, and that the Vsame will, when itreaches the end of thebushing, be collectednto the interior grooves,

whence it returns te the outer channel. Thus the oil will circulatearound the bushing, and will not be and lost through .the ends as it nowis, but will last until completely' used up forwlnbric'tingpurposes.

Where'no bushing is used, the inner surface of the hub is recessed orgrooved to -'ornr,cliannelslforretnin-` -A represents a io'ose pulley orgenr-wlieel, having a. bushing, B, within its' hub. v".lhe outerperiphery of, the bushing B contains 'a chamber, a, extending nlmos'tfrom end to end of thebushing, us shown in ignrl,` the said channelbeing enclosed vby shoulders b, formed onmthe ends of the bushing.Within the interior surfnce of i the bushing are .formed 'concentricgrooves e c, one near ench'end of the bushing.l Bv niunsfpfn holes d d,the

grooves c nre connected with the chamber a, `end/the latter isalso-connected with the innbrrfull surface of they. j bushing, by meansof a. hole, e.- The chamber a receives its supply of'oilorlubricating-matter through a hoiehfg` which can be closedeby means of ascrew-plugva'sshown. When the pulley is hung upon a shaft so fthat theend` of the hole e leads ,directly to the surface of the sha'ft,^thelubrieatingQmntter contained in the chamber a will l i liow uponthe'shaft through the hole c, andiwill lubricate the shaft. 'As it isbeing carried to one`or `the other v i. end of the bushing, thelubricating-matter will rbe collected inv the grooves c, whence it`willreturn through the; holes d to the chamber a. Thus nolubrieating-matteris allowed to `escape at the ends of the bushing, andnonei willconsequently be wasted, soth'at a. small amount 'of lnbricatiogn-mntterIcan beimade to lust for a comparatively long time. The grooves c c muy,if desired, be arranged spiral or even lengthwise, `in the'innersuil`ace"` of the bushing. 4When no bushing isnsod, the interior of thehub. isgroovod, asshown at g-g in `figs. l `and 3,l

Wherebfyr the lubricating-matter can be retained on the shaft withinthehub.

We claim as new, and desire to secure 'by Letters Patent- 'The lbushingB within thehub of the loose pulley, constructedasl described, havingthe chamber a around ,i l its periphery, communicating'withjthe shaft-bymeans of the opening e, the ends 6 of said `bushing fitting snugly lWithin thn hub, and provided withthe concentric groove c, communicatingwith the shaft,` and chnuiberiaby` mennsof the opening d, whereby a.constant circulation of lubri bushing, as herein shown and described. ll i. y

GEORGE M. MORRIS, JOHN McOREARY.

.Witnessesz JOHN Powers, Anrnun E. Asnnown.

eating-matter`is obtained 'within und around thef

